Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type8 g# d1 S$ U6 N* G6 C
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
8 G( r% d7 m* U& Q+ Author Affiliations
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4 Q+ M, B+ f' D6 O& Z1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
7 n" I( X& _& \4 O, J! y _9 c2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan " Q# z1 q3 j. ~3 T/ q
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ( h# }7 P! L- F# ~
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan 6 |9 \- W8 Z- \
5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan
. I: g/ K3 o+ }+ I6 d1 K- i6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
5 u) w1 Y! J0 \4 x7Kinki University School of Medicine, Osaka 589-8511, Japan
: i# [( C# M5 i4 U* L+ a' ?/ X9 {+ S. f8Izumi Municipal Hospital, Osaka 594-0071, Japan
$ p3 {2 z& e3 d" O9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan
3 _" i# x0 W: _Correspondence to: Nobuyuki Yamamoto, Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan. Tel: +81 559895222, Fax: +81 559895783, e-mail: n.yamamoto@scchr.jp
, }) A: e1 j; c+ o$ L5 T+ S- u; k; DAbstractBackground: The antimetabolic agent S-1 inhibits thymidylate synthase similar to pemetrexed, but through a different mechanism of action. Whether the antitumour activity of S-1 depends on histological type remains unclear. We analysed pooled data from 2 phase II clinical studies of cisplatin and S-1 in patients with previously untreated advanced non-small cell lung cancer. Patients and Methods: We comprised 110 patients with stage IIIB or IV non–small cell lung cancer. Univariate and multivariate analyses were performed to determine the effects of histological type on progression-free survival and response rates. Results: On pooled analysis of the data, according to histological type, median progression-free survival was 3.8 months in patients with squamous cell carcinoma and 4.4 months in those with non-squamous cell carcinoma. Both analyses showed that progression-free survival and response rate did not differ significantly. Conclusion: Unlike molecular targeted agents and pemetrexed, a combination of cisplatin and S-1 may be no difference in response according to histological type.
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